Java default constructor example. Here is an example of the default constructor being used to create an instance of this class and print out the initial values of the class's properties. void main() ...

In this Java 101 tutorial, I’ve explained how interfaces differ from classes, and showed you how to declare, implement, and extend interfaces in your Java programs.

When default methods were introduced in Java 8, some developers thought they would be the same as abstract classes. That’s not true, however, because interfaces can’t have state.